Allplan Bridge is the professional BIM solution for modeling, analysis, design, and detailing. Engineers work with a single solution from parametric model creation with high level of detail including pre-stressing to integration of the construction process, structural analysis, and reinforcement design and detailing.

With **Allplan Bridge 2021**, we offer you a future-oriented BIM solution for engineers. The software is characterized by high performance, especially in the area of cross-team collaboration, and thus contributes to greater efficiency and productivity in day-to-day work. The openBIM approach supports smooth, interdisciplinary cooperation with project partners. There are various improvements for engineers, including views and sections, reinforcement and country-specific adaptations. There are also new features in the area of steel construction and structural analysis for bridge construction.

Allplan Bridge uses the multi-mode Response Spectrum Method for evaluating the effects of seismic loading. The solution consists of 2 separate tasks in the calculation procedure, firstly the determination of the relevant natural modes of the structural system and secondly the evaluation of the response spectrum prescribed in the design code.

The natural modes of the structure are calculated on the undamped system by determining the roots of the homogeneous equation system [K]*u – Ω2*[M]*u = 0. A subspace iteration scheme is used to find the eigenvalues of this equation system and thus the natural frequencies Ω and relevant displacement directions for computing the mode shapes. Further also the mass matrix is required, representing the vibrating masses of the structure, as governing parameter of the Eigen value calculation. In the program, the self-weights and superimposed dead loads as defined for the static load-case calculation and any further user defined mases are considered for calculating a consistent mass matrix.

In case of an earthquake, the actual extent of excitation of the different natural modes is dependent on the direction of the seismic waves (ground accelerations), the corresponding mass participation and on the damping behavior of the structure. The analytic solutions for typical structures and unit impacts are provided in the design codes as relevant response spectra, specifying the relevant proportionality factors for the individual eigenmodes dependent on the natural frequency. The calculated amplitudes related to the individual natural modes are superimposed using different methods described in literature. The program offers the ABS-method, the SRSS method, and the Complete Quadratic Combination (CQC). Three separate calculations are provided to consider different possible earthquake directions, transverse, longitudinal and vertical directions. These different cases are combined to get finally the envelope of extreme values.

The table definition and visualization of the combination scheme allows highest usability and perfect overview. The table form gives the user an overview not only of the defined load factors but also of different types of combinations. The combination type becomes an important attribute when the code-based design is performed. It allows specific design procedures to use the corresponding combinations automatically.

Particularly important for the construction stage analysis of prestressed and reinforced concrete structures is the correct consideration of the time-dependent effects. In Allplan Bridge, the calculation of creep and shrinkage of concrete and relaxation of prestressing steel is code-compliant and now also available for Chinese and Korean Standard.

Once the global effects are calculated and the relevant envelopes have been created, the user can perform code dependent design tasks to determine the required reinforcement content. After the reinforcement area has been calculated or manually specified, ULS and SLS checks can be performed according to EN code, and ULS flexural capacity checks according to AASHTO LRFD.

There are many further features and improvements included in this version. An important new functionality is the possibility to interactively moving a station or a section. Furthermore, it is possible to interactively displaying the cross-section at any point along the structure. This gives the user a better control of the parametrically defined geometry. Some new features are available also for tendon modeling. For example, it is possible to use a longitudinal eccentricity for the tendon point definition. This minimizes the necessary definition of stations. A further new functionality is a sophisticated tendon report, which generates an Excel sheet containing not only geometrical data but also certain analytical data, e.g. the initial forces in the tendon. What is more, the construction sequence calculation is extended with a detailed computation of camber values, which are exported to an Excel sheet.

You can adopt the data from an existing design (using LandXML data format) or define it manually.

You can define any cross-section and determine the geometry with its dependence and variables.

When defining the cross-section, standardized and repeatedly arranged cross-section parts such as longitudinal stiffeners in steel can be easily placed in the section.

The multidiscipline model in Allplan Bridge is completely parametric. Changes can be made at any time.

Parametric pre-tensioned and post-tensioned tendon types can be created.

A stressing sequence can be defined for each tendon specified in the model.

Time as the 4th dimension is considered by easily specifying the construction process.

Automatically generates the analysis model from the geometrical model.

Analyses the defined construction schedule and sets up all necessary calculation definitions in an automated process.

The weight and the position of superimposed dead loads (like sidewalk, road pavement, etc.) are automatically retrieved from the geometrical model.

Traffic loads can be defined and applied in a very comfortable way. On the one hand, traffic loads can be applied automatically according to the selected standard.

The most unfavorable effects due to traffic loads can be determined quickly and easily using the theory of (related) influence lines.

The user-friendliness of the superposition in Allplan Bridge is groundbreaking. The schematic definition of the superposition combines maximum flexibility with optimal overview.

A global static analysis based on the Bernoulli beam theory is performed for all automatically and manually generated calculation actions deﬁned previously in the construction sequence definition.

Design of necessary reinforcement area is based on both ULS and SLS requirements. Governing combinations of internal forces are checked against ﬂexural, torsional and shear resistance and requirements for stress limitations.

To add details such as lamp posts or anchor bodies to the model, Allplan Bridge allows objects from the Allplan library to be referenced. Objects are automatically aligned and adapted each time the bridge geometry is changed.

The entire 4D model adjusts in the event of any change. If the geometry of an axis changes, the entire bridge model is automatically adjusted. This applies to the analytical model including construction sequences definition and associated load cases and calculation actions.

Powerful 3D modeling functionality allows to implement all bridge details without compromise: simply, flexible, and with the highest level of precision. The Parasolid modeling kernel from Siemens handles intricate free-form geometry.

With Allplan, even challenging bridges with double curvature and varying cross-sections are reinforced conveniently and rapidly. The reinforcement is defined in different cross-sections and the transitions between the cross-sections are described with paths.

Elevations, longitudinal sections along any path and transverse sections are derived from the digital bridge model. CineRender from Maxon is used for realistic visualizations.

The digital bridge model contain multitude of information. Comprehensive reports are available at the touch of a button. This also applies to rebar bending schedules.

Allplan Bridge has interfaces to Allplan Engineering and Allplan Bimplus to save the 4D model in many data formats, such as IFC, DWG, DGN or PDF.

The analytical model generated in Allplan Bridge can be shared with other analysis solutions connected to Allplan Bimplus.

With the combination of Allplan and Allplan Bimplus, everyone involved has access to the latest design, anytime, anywhere and with any device. BIM coordination happens interactively on the digital bridge model.

Download the 30-day free version of Allplan 2021 and discover a reliable way to reduce your workload and save time!

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